58 results about "Chlorate" patented technology

The disclosure relates to a method of producing a multi-metal catalyst film and of producing a reactor system for catalytic removal of a wide variety of contaminants (for example, nitrate, nitrite, perchlorate, chlorate, chromate, selenate, chlorophenols, 2,4-D, dicamba, atrazine, trichloroacetic acid, bromochloroiodomethane, NDMA, TCE, TCA, chloroform, freons, RDX, HMX, TNT, PFOA, and PFOS) from water and wastewater. The disclosure also relates to a method of using the multi-metal catalyst for the removal of such contaminants and a system comprising the multi-metal catalyst film for removing such contaminants.

The invention belongs to the technical field of civil engineering materials, and particularly relates to sprayed concrete suitable for a chlorine salt erosion environment and a preparation method of the sprayed concrete. And meanwhile, the bionic helical carbon nanotube-polymer composite gel is pre-dispersed in water. Sequentially adding the aggregate, the fiber and the composite cementing material, carrying out dry mixing, adding the gel dispersion liquid, the water reducing agent and the air entraining agent, and stirring to obtain a mixture; and finally, adding an alkali-free liquid accelerator at a nozzle through a wet spraying process, and spraying the alkali-free liquid accelerator to a construction surface. The nano hybrid material can effectively adsorb and lock chloride ions, and the bionic gel has a crack self-repairing function. And the two components have a synergistic effect, and are combined with a compact microstructure and a fiber reinforcing and toughening effect, so that the obtained concrete has extremely high chloride ion penetration resistance and durability, and is particularly suitable for support and protection engineering in chlorine salt environments such as temporary expressways and the like.

The invention provides a bio-based composite environment-friendly snow melting agent. The bio-based composite environment-friendly snow melting agent comprises the following components in parts by weight: 20-50 parts of a bio-based component, 15-30 parts of a chlorine salt component, 5-10 parts of calcium oxide, 10-20 parts of urea, 20-40 parts of potassium acetate, 2-8 parts of a composite corrosion inhibitor and 2-8 parts of an anti-skid adsorption component. According to the bio-based composite environment-friendly snow-melting agent disclosed by the invention, a renewable bio-based material is used for partially replacing a traditional snow-melting component and is compounded with conventional chlorine salt and non-chlorine salt snow-melting components, and a composite corrosion inhibitor and an anti-skid adsorption component are added, so that the aims of efficiently melting snow, being low in corrosivity and being harmless to the environment can be fulfilled.

The invention provides a Fe-Co-Ni series nano-alloy and a preparation method and application thereof, and belongs to the technical field of functional materials. The alloy is prepared by the following steps of: weighing and proportioning 0.5 mmol of each element by taking chlorate or acetylacetonate or acetate of iron, cobalt, nickel, manganese, copper, zinc and the like with the purity of more than 99.5% and other metal chlorides which are rich in earth surface and economical and practical as precursors, putting the precursors into a pressure-resistant bottle, taking n-trioctylphosphine oxide (TOPO) as a ligand, taking ethanol and 1-octadecene (ODE) as a mixed solvent, and uniformly stirring to prepare the alloy. And synthesizing the hexagonal nano-alloy at low temperature by using a wet chemical method. The method can be used for synthesizing 3-10-element medium-entropy and high-entropy alloy, and has a wide application prospect. The synthesis is a precise process which is guided by an organic ligand, is coordinated by multiple metals and is subjected to nucleation-self-assembly-anisotropic growth.

The invention belongs to the technical field of photocatalytic application, and particularly relates to a photocatalytic leaching method for precious metal in a brine phase of chlorate. The method comprises the following steps: mixing the waste rich in noble metal, a solution containing chlorate and a photocatalyst, carrying out photocatalytic leaching reaction on the obtained mixed slurry under an illumination condition, and carrying out solid-liquid separation to obtain a leaching solution containing noble metal. The chlorate solution is used as a solution environment, a photocatalytic leaching method is used, precious metal is oxidized to generate a precious metal chlorine complex, the precious metal chlorine complex is dissolved in water, and finally the purpose that the precious metal is leached into a solution from a solid is achieved. The method has the characteristics of low reaction cost, low reaction energy consumption and high leaching rate.

A method of treating a subterranean formation by contacting the formation with the following (a) ammonium bicarbonate; (b) an oxidizing agent selected from a perchlorate or a nitrite or combinations thereof; and (c) an acid (AA).

The present invention relates to systems and methods for catalytic removal of oxidized contaminants (for example, nitrite, chromate, chlorate, trichloroethene, CFC-11, 4-nonylphenol, RDX, and perfluorooctanoate) from water and wastewater. In some aspects, the catalytic method of removing oxidized contaminants comprises using precious metal nanoparticles as catalysts to reduce the oxidized contaminants.

The application discloses activated carbon for reducing content of chlorate in water and a preparation method thereof, and belongs to the technical field of wastewater treatment. The application sequentially constructs a chlorinated glycidyl trimethyl ammonium cation layer for electrostatic adsorption of chlorate and a nano zero-valent iron functional layer for chemical reduction of the chlorate on the coconut shell activated carbon through bridging action and chemical grafting of polydopamine, forms a unique 'adsorption-degradation' integrated structure, greatly improves the treatment efficiency, ensures stability of functional components through chemical bonding, avoids secondary pollution, and has remarkable social, economic and environmental benefits.

A system, comprising: a chlorine source in form of an electrolysis unit to generate an insitu generated active chlorine; wherein a concentration of perchlorate is not more than half of a concentration of chlorate; and pH of a fluid containing in-situ generated active chlorine is more than 7.4; a buffer tank to store a concentrate of in-situ generated active chlorine as a free available chlorine (FAC); a fluid distribution system to supply FAC in form of an in-use fluid to the cabinet; wherein the system is configured to clean and disinfect an article with the fluid while complying with national and international standards for food safety, operator's safety and regulatory requirements regarding the use of biocides.

Aerobic microbial processes comprise culturing microbes comprising a (per)chlorate respiration pathway in a bioreactor in a bioprocess employing microbial respiration of chloroxyanions as a source of oxygen for the bioprocess, in the absence of external addition of molecular oxygen.

The invention discloses a multistage oxidation treatment method of petroleum refining waste lye, and belongs to the technical field of hazardous waste treatment.The multistage oxidation treatment method comprises the steps that 1, ZnSx at-Fe3O4 / MIL-100 (Fe) and a chlorate-containing oxidizing agent solution are added into the waste lye, a reaction is conducted for 4-6 hours under the micro-negative pressure condition, and most of foul smell is eliminated; (2) adding hydrogen peroxide into the mixed solution treated in the step (1), and reacting at room temperature for 2.5-3.5 hours to completely deodorize; adjusting the pH (Potential of Hydrogen) to 8.0 to 9.0; (3) carrying out solid-liquid separation on the mixed solution treated in the step (2), recycling filter residues, and carrying out next-step reaction on filtrate; 4) adjusting the pH value of the filtrate treated in the step 3) to 2.8-3.3 by using dilute sulphuric acid, and adding ferrous sulfate / hydrogen peroxide into the filtrate for deep treatment; adjusting the pH (Potential of Hydrogen) to 8.0 to 9.0; and (5) carrying out solid-liquid separation on the mixed solution treated in the step (4), and recycling the filtrate after evaporative desalination and biochemical treatment.

The utility model discloses a reactor of chlorine dioxide generator relates to chlorine dioxide preparation technical field, including multistage reaction unit of intercommunication, and the liquid communication pipe and the gas communication pipe are communicated between adjacent reaction unit, and the first stage reaction unit is connected with the feed dynamic mixer, and the last stage reaction unit is connected with the disinfectant outlet pipe and the disinfectant gas outlet pipe. The reactor can realize gas, liquid branch circuit operation in use, make the chlorine dioxide in the reaction liquid in time from the reaction liquid to the gas phase space of reactor, then from disinfectant gas outlet pipe, prevent the chlorine dioxide from the disproportionation reaction and generate chlorate in liquid phase, to improve its reaction effect, raw material conversion rate, chlorine dioxide purity improves obviously, prevented the occurrence of disproportionation reaction.

The invention discloses a detection kit and a detection method for chlorate in dairy products and water, chlorate is converted into 2, 4-dichloroaniline, the chlorate detection kit is prepared by constructing a 2, 4-dichloroaniline antigen-antibody expression system and utilizing an immunodetection technology, and further, colloidal gold test paper is prepared. The detection time of the kit is only 5-10 minutes, the sensitivity can reach 50-100 mu g / kg (0.05-0.1 ppm), on this basis, a method for detecting chlorate in dairy products and water is further provided, the method is simple in operation step, high in detection speed, high in sensitivity and small in relative error, and compared with the national standard, the method has the advantages that a detection instrument is simple and easy to operate, the detection cost is low, and the like. The method is suitable for rapid detection of large-batch samples.

A method for testing the content of perchlorate comprises the following steps: adding a separating agent and an organic extractant I into a sample for extraction I, adding a fluorescent complexing agent solution into the obtained water phase, mixing, standing for more than 2 minutes, adding an organic extractant II for extraction II, and calculating the content of perchlorate in the sample according to the fluorescence characteristics of the obtained organic phase, the separating agent is prepared from crystals A, potassium chloride and water according to the mass ratio of (0.01-0.03): 1: (40-100); the main component of the crystal A is methylene blue; the fluorescent complexing agent is a phthalic acid bisamide derivative. The method is high in sensitivity and accurate in quantification; the capacity of resisting interference of inorganic anions is achieved, the sample pretreatment requirement is reduced, and the good detection effect on multiple kinds of liquid is achieved; the instrument hardware requirement is low, and the detection cost is low.

To provide a method for producing a chlorous acid aqueous solution using a product obtained by electrolyzing a salt as a raw material.SOLUTION: The present invention provides a method for producing a chlorous acid aqueous solution using a salt as a raw material. The present invention provides a method for producing a chlorous acid aqueous solution, comprising the steps of: 1) electrolyzing a salt to obtain a chlorate or an aqueous solution thereof; and 2) reducing the chlorate or the aqueous solution thereof to produce an aqueous solution containing chlorous acid. The method for producing the chlorous acid aqueous solution includes a step of mixing any single substance or two or more single substances of an inorganic acid or an inorganic acid salt, and then mixing any single substance or two or more single substances of an inorganic acid, an inorganic acid salt, an organic acid, or an organic acid salt.SELECTED DRAWING: None

The invention relates to a method (70) for cleaning an aqueous composition, referred to as the conveying composition (61), for conveying floating objects belonging to the group of fruits and vegetables, in a hydraulic conveyor of such floating objects, the hydraulic conveyor being of a type; —with the recirculation of the conveying composition (61), and; —with treatment of the conveying composition (61) by addition of chlorine dioxide (65) kept in the conveying composition (61) during the conveying of such floating objects for the purposes of controlling the microbiological flora growing in the conveying composition (61), whereby a conveying composition, referred to as a chlorate-rich composition (66), comprising the chlorate anion of general formula (CO3) in a hydrated form in the chlorate-rich composition (66), is formed due to this treatment; method in which, the hydraulic conveyor being devoid of floating objects and the addition of chlorine dioxide (65) in the chlorate-rich composition (66) being suspended; a flow rate of a composition, referred to as the composition (42) to be cleaned, formed by mixing a flow of the chlorite-rich composition (66) and at least one flow of a composition, referred to as the photoreactive composition (40), comprising at least one photo-sensitive compound chosen from the group formed of sulfite anion salts, bisulfite anion salts, disulfite anion salts and salts of a hydrosulfite anion is irradiated (75) by an electromagnetic radiation comprising at least one electromagnetic wave in the UV-C range, so as to form, in this composition (42) to be cleaned, at least one compound, referred to as the active compound (77), capable of reacting chemically with chlorate anion F and forming a conveying composition, referred to as the cleaned composition (67), with a concentration of chlorate anion less than the concentration of chlorate anion in the chlorate-rich composition (66). The invention also relates to a hydraulic conveyor equipped with a cleaning device for implementing such a method.

The invention belongs to the technical field of metal smelting, and relates to a method for synergistically enriching platinum and palladium from a silver anode mud nitric acid leaching solution and preparing sponge palladium in a green short process, which comprises the following steps: adding a diacetyldioxime-thiourea alkaline solution into the silver anode mud nitric acid leaching solution to carry out platinum and palladium co-precipitation to obtain a co-precipitate; after slurrying, adjusting the pH value to 9.0-10.0, and carrying out primary alkaline conversion; then hydrochloric acid is added for secondary conversion, and a chlorate saturated solution is added for a reaction after secondary conversion is finished, so that platinum-palladium-containing filtrate is obtained; then adding an oxidizing agent and ammonium chloride, and reacting to obtain a platinum-palladium co-precipitate; after slurrying, adding a reducing agent for reaction to obtain a palladium-containing solution; then adding an oxidizing agent and ammonium chloride, and reacting to obtain high-purity palladium-containing slag; mixing with ammonia water for complexing, adding hydrazine hydrate after reaction, and reducing to obtain sponge palladium. According to the method, reaction conditions are mild, multi-component recovery of platinum, palladium and silver in the silver anode slime is achieved, and the resource utilization rate is high.

The application discloses a preparation method and application of canthaxanthin, and comprises the following steps: in the presence of beta-carotene, a catalyst, an additive and a solvent, the canthaxanthin is prepared by reaction at a temperature of-20 DEG C to 20 DEG C for 5-24 hours; the catalyst comprises a mixture of chlorate, metal iodide and inorganic acid; the additive comprises a mixture of raw materials represented by formula I, formula II and formula III, wherein the mass ratio of the raw materials represented by formula I, formula II and formula III is 1:(1.0-5.0):(1.0-5.0); and the total additive amount of the additive is 0.01-1 times the mass of the beta-carotene. The preparation method of the canthaxanthin has the characteristics of fast reaction speed, high product yield, less generation of three wastes, strong coloring capacity of the product and excellent thermal stability, and has great competitive advantage in the field of food and drug additives.

Provided is a nickel recovery method for efficiently recovering nickel from a nickel solution containing 2,2'- bipyridine and a nickel compound generated in an organic chemical reaction process.　The nickel recovery method according to the present invention comprises: (a) a step for preparing a nickel solution containing 2,2'- bipyridine and a nickel compound generated in an organic chemical reaction process; (b) a step for adding an alkali metal perchlorate to the nickel solution to form a tris (2,2'- bipyridine) perchlorate nickel salt serving as an ion pair; and (c) a step for recovering the tris (2,2'- bipyridine) perchlorate nickel salt.

To provide an agent that imparts immediate and sustained disinfecting effects to epidemic prevention slaked lime used in "anticipatory disinfection," and a new epidemic prevention disinfectant that uses the agent in combination with epidemic prevention slaked lime. [Solution] An antibacterial and antiviral agent containing a chlorite-supported inorganic porous material (A) in which chlorite is supported on an inorganic porous material, and lauryl sulfate (B).

The invention relates to a fuel-free low-temperature oxygen candle oxygen-producing flux core which is prepared by uniformly dry-mixing 96-98 wt% of a chlorate oxygen-producing source, 1-2.5 wt% of a catalyst, 0.1-1 wt% of a chlorine inhibitor and 0.1-0.5 wt% of a high-thermal-conductivity carbon-based nano material as raw materials and pressing the raw materials, and the density of the oxygen-producing flux core is 1.9-2.5 g / cm < 3 >. The oxygen-producing flux core adopts a fuel-free formula, can realize continuous and stable combustion in a low-temperature environment of-50 DEG C until oxygen release is finished, and is high in safety, high in reliability, low in heat production, stable in oxygen release and free of chlorine in released gas.

The preparation method comprises the following steps: dissolving a certain amount of noble metal palladium chlorate or silver nitrate in a certain amount of absolute methanol to obtain a solution A; adding a certain amount of alumina powder into a certain amount of absolute methanol to obtain a solution B; adding the solution A into the solution B, and adding a certain amount of methanol solution of 1M sodium hydroxide; and centrifugally washing the obtained precipitate with absolute ethyl alcohol for 3-5 times, drying at 60-80 DEG C for 12-15 hours, and calcining in a tubular furnace at 400-500 DEG C in a hydrogen atmosphere to obtain the noble metal loaded aluminum oxide catalyst. The preparation process is simple and practical, the particle size of the noble metal Pt or Ag is reduced to dispersed single atoms, the dispersity is improved, the noble metal loading amount required by catalysis is reduced, the cost is reduced, and the prepared catalyst is stable in catalytic performance, good in activity and high in catalytic efficiency and can be commercially used.

The application provides a kind of detecting perchlorate ratio type probe and its preparation method and application, it is related to analytical detection technical field, the ratio type probe includes poly (3- ((4-methyl thiophene-3-oxyl) propyl) pyridine), preparation method includes: 3- (3-bromopropoxy) -4-methyl thiophene and pyridine are mixed and reacted, 3- ((4-methyl thiophene-3-oxyl) propyl) pyridine is synthesized, it is reacted with anhydrous chloroform, anhydrous ferric chloride and obtained intermediate product;Intermediate product is transferred and filtered, and solid precipitate is obtained, methanol is added, and hydrazine hydrate is added dropwise to reduce, then filter, the methanol of filtrate is removed by evaporation, and the crude product is obtained;The crude product is dialyzed and purified, and poly (3- ((4-methyl thiophene-3-oxyl) propyl) pyridine) is obtained.The ratio type probe provided by the application shows chromatic aberration response and high detection sensitivity. ‑ ​

To provide a circulation water treatment system for breeding aquatic lives for efficiently decomposing ammonia or ammonium ions in water by a method where dependence on microbes is suppressed, and for efficiently removing pollution elements other than the ammonia or ammonium ions.SOLUTION: A circulation type treatment system 1 comprises: a removal part 5; an electrolysis part 13; and a residual chlorine removal part. The removal part 5 removes a solid included in breeding water in a first region where the breeding water sent from a breeding tank 3 is stored or is circulated. The electrolysis part 13 generates a chloric acid compound by electrolysis of the breeding water, in a second region where the breeding water passed through the first region is stored or is circulated, then causes the generated chloric acid compound to react with ammonia or ammonium ions in the breeding water. The residual chlorine removal part removes at least residual chlorine, in a third region where the breeding water passed through the second region is stored or is circulated.SELECTED DRAWING: Figure 1

The application aims to provide a preparation method of a cathode electrode for electrocatalytic reduction of chlorate and application thereof, and belongs to the technical field of chlorate treatment. The application realizes electrocatalytic reduction of chlorate by virtue of non-noble metal and excellent redox capacity of transition metal elements. The system uses molybdenum foil as a base material and loads Pd / C. By virtue of hydrogenation activation of Pd and excellent redox performance of multivalent Mo species, electrocatalytic reduction of chlorate is effectively realized. The catalytic system reduces occurrence of a hydrogen evolution side reaction, realizes selective reduction of chlorate, and guarantees stability and high efficiency of catalytic reduction.

The invention relates to the technical field of alloy foil manufacturing, in particular to an electrolyte composition for preparing a copper-nickel alloy foil and application. Comprising 100-200 parts by mass of a first metal nickel salt, 2-15 parts by mass of a second metal nickel salt, 10-60 parts by mass of a metal copper salt, 40-100 parts by mass of a metal complexing agent, 40-100 parts by mass of an acid-base regulator, 2-10 parts by mass of a brightener and 0.1-0.2 part by mass of a wetting agent, and the second metal nickel salt is a chlorate; by controlling the proportion of the chloride ion concentration, the nickel ion concentration and the copper ion concentration in the electrolyte and controlling the adding proportion of the metal complexing agent, the acid-base regulator, the brightener and the wetting agent, the tensile strength and the ductility of the copper-nickel alloy foil can be improved.

The invention discloses a method for preparing a pure-phase doped ternary precursor by a spray pyrolysis method based on a chlorate system, and relates to the technical field of inorganic chemistry and material science, and the method comprises the following steps: in a spray pyrolysis temperature rise stage, continuously sampling an ion flux field containing a plurality of metal ions in the chlorate system, and establishing a metal ion migration asynchronous analysis baseline, and generating a migration-diffusion difference graph for representing the relative deviation of the metal ion migration rate. According to the method, by constructing a diffusion difference graph and a stress density spectrum and combining an electric static force field and acoustic flow regulation and control, doping and main metal migration synchronization is achieved; and through cooperation of chlorate structure reconstruction and magnetic heat, electroacoustic and photo-thermal three-field cooperative control, a reverse diffusion trap is eliminated, doping clamping is stabilized, and the phase purity and the structure consistency of the ternary precursor are improved.

The invention provides biocidal compositions comprising aqueous solutions of hypochlorite buffered with an organic acid and a base and in which chlorate, as a percentage of all active species of chlorine present, is less than a threshold value such as 5.4% for at least six months after the composition is made.

A method of reducing activity of sulfur and / or nitrogen metabolizing bacteria is provided. The method includes adding a composition of an alkali metal salt of chlorite and / or an alkali metal salt of chlorate and hydrogen peroxide to process water of a cooling tower and increasing a concentration of the composition from about 0 ppm to about 300 ppm in about 1 to about 100 minutes.

The invention discloses a method for high-selectivity synthesis of pyridoxine phosphate based on a phase transfer catalysis system. According to the method, pyridoxine phosphate is used as an initial raw material, and in a water-organic solvent two-phase system, under the synergistic catalysis of a phase transfer catalyst and TEMPO, chlorite and pypocholoride are used for oxidation. The quaternary ammonium salt phase transfer catalyst is introduced, so that the reaction activation energy is remarkably reduced, and the reaction can be quickly carried out at the low temperature of 0-10 DEG C; meanwhile, a specific narrow window of which the reaction pH value is 5.8-6.2 is accurately locked. The method effectively solves the technical problems that the reaction rate is slow, phosphate bonds are easy to hydrolyze and pyridine rings are easy to generate chlorination side reaction when a traditional TEMPO oxidation system is used for preparing compounds containing phosphate groups. The yield of the obtained product can reach 90% or above, the content of specific dephosphorized impurities is lower than 0.05%, and the method is suitable for preparing high-purity medical standard substances.